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Horses

In pregnant mares, unlike most other animals, antibodies do not cross the placenta into the foal's blood stream before birth. Therefore, when a foal is born it has no natural defence mechanisms against infection because it has no antibodies, that are the blood’s special immune proteins, with which to fight infection.

The expected birth of a foal from a favorite mare is an exciting but worrying time for many horse owners. Ideally, help and advice should be sought from your veterinarian or someone with experience in foaling mares, in good time before the event.

Cracks may form in the horse’s hoof wall, usually in a vertical direction, and either originate from the ground surface (sometimes called grass cracks) or, less commonly, from the coronary band (sometimes called sand cracks).

A keratoma is a rare benign tumor of the inner layer of keratin-producing epidermal hoof wall cells that forms inside a horse’s foot. As the tumor slowly grows, it expands and separates the hoof wall laminae, causing pain and lameness.